diff --git a/README.md b/README.md
index 366d16e..c89556a 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,15 @@ The unit tests can be run with the following command:
 pnpm test
 ```
 
+To get test coverage
+
+```shell
+# Does not work via pnpm script so need to call node directly
+node --import tsx --test --experimental-test-coverage --test-reporter=lcov --test-reporter-destination=lcov.info src/*.test.ts
+# To generate a html report use genhtml which is part of lcov OS package
+genhtml lcov.info --output-directory coverage
+```
+
 The end-to-end tests are written with [playwright](https://playwright.dev/).
 The tests are in `apps/class-solid/tests/*.spec.ts` and can be run with the following command:
 
diff --git a/packages/class/.gitignore b/packages/class/.gitignore
new file mode 100644
index 0000000..bfefed5
--- /dev/null
+++ b/packages/class/.gitignore
@@ -0,0 +1,2 @@
+lcov.info
+coverage/
diff --git a/packages/class/package.json b/packages/class/package.json
index 0b6b922..ebf12a3 100644
--- a/packages/class/package.json
+++ b/packages/class/package.json
@@ -22,6 +22,6 @@
     "zod-to-json-schema": "^3.23.1"
   },
   "engines": {
-    "node": ">=20"
+    "node": ">=20.16.0"
   }
 }
diff --git a/packages/class/src/bmi.test.ts b/packages/class/src/bmi.test.ts
new file mode 100644
index 0000000..52f1e7c
--- /dev/null
+++ b/packages/class/src/bmi.test.ts
@@ -0,0 +1,19 @@
+import assert from "node:assert/strict";
+import { before, describe, test } from "node:test";
+import { BmiClass } from "./bmi";
+
+describe("BmiClass", () => {
+  let bmi: BmiClass;
+  before(() => {
+    bmi = new BmiClass();
+  });
+
+  describe("get_component_name", () => {
+    test("returns the component name", () => {
+      assert.strictEqual(
+        bmi.get_component_name(),
+        "Chemistry Land-surface Atmosphere Soil Slab model",
+      );
+    });
+  });
+});